Large and wide continuous electronic packaging gas protection sintering furnace

Abstract

The present invention relates to the technical field of sintering furnaces, and more specifically to a large-width continuous electronic packaging gas-protected sintering furnace, comprising an impeller, which is arranged at the entrance of the furnace body and blocks the impeller, wherein the impeller comprises a rotatable shaft and a plurality of groups of blades evenly arranged along the circumference of the shaft, wherein a gap is provided between two adjacent blades to form a feeding space for accommodating a portion of material, and the plurality of groups of feeding spaces rotate around the shaft with the feeding of the conveyor belt and continuously feed the material. The present invention blocks the entrance of the furnace body by providing an impeller, so that the furnace body cannot be connected to the outside through the entrance, slows down the speed of gas escape, ensures the concentration of protective gas in the furnace body, and reduces the probability of adverse reactions during the sintering process of the product; at the same time, a gap is provided between two adjacent blades to form a feeding space for accommodating a portion of material, and when the impeller rotates, the plurality of feeding spaces rotate around the shaft to continuously feed the material, thereby realizing continuous feeding and not affecting the sintering speed.

Description

Technical Field

[0001] The invention relates to the technical field of sintering furnaces, in particular to a large-width continuous electronic packaging gas protection sintering furnace. Background Art

[0002] The wide-body continuous electronic packaging gas-shielded sintering furnace is a sintering device specially used in the field of electronic packaging. The wide-body design can accommodate larger products or more products for sintering at the same time, increasing the output of a single sintering. The continuous structure can realize continuous feeding and discharging of materials, improve production efficiency, and is suitable for large-scale production applications. Gas protection refers to the introduction of inert gas or reducing gas into the furnace to form a protective atmosphere to prevent material oxidation or adverse reactions with other components, thereby ensuring product quality.

[0003] In actual use, since the furnace body needs to be fed continuously, the inlet of the furnace body needs to be a normally open structure so that the gas inside and outside the furnace can circulate. However, this will cause the protective gas filled inside to escape, making it easy for adverse reactions to occur during sintering of the material, which is not conducive to the quality of the sintered product. Summary of the invention

[0004] In view of the problems in the prior art, the present invention provides a large-width continuous electronic packaging gas protection sintering furnace, and the specific technical solution is as follows:

[0005] Large and wide continuous electronic packaging gas protection sintering furnace, including:

[0006] A furnace body having at least one inlet;

[0007] A conveyor belt is laid through the inlet into the furnace body to transport materials;

[0008] Also includes:

[0009] The impeller is arranged at the entrance of the furnace body and blocks it. The impeller includes a rotatable shaft and a plurality of blades evenly arranged along the circumference of the shaft. There is a gap between two adjacent blades to form a feeding space for accommodating a portion of material. The plurality of feeding spaces rotate around the shaft with the feeding of the conveyor belt and feed the material continuously.

[0010] As a further technical solution of the present invention, the blade comprises:

[0011] a plate body, wherein a gap is formed between the plate body and the conveyor belt when the plate body rotates;

[0012] The deformable part includes a sealing film connected to the free end of the plate body, and the other end of the sealing film is connected to a counterweight shaft. The counterweight shaft is affected by gravity to stretch the sealing film to form a temporary sealing surface between the plate body and the conveyor belt to fill the gap.

[0013] As a further technical solution of the present invention, the sealing film is a bag-type structure, and the counterweight shaft is installed in the sealing film. When the counterweight shaft is overlapped to the conveyor belt, the part of the sealing film spaced between the counterweight shaft and the conveyor belt is compressed to deform.

[0014] As a further technical solution of the present invention, the sealing film is filled with a support member, the support member is polyurethane foam, and the interior of the support member is a hollow structure.

[0015] As a further technical solution of the present invention, the support member is arranged in the sealing film in an X-structure to form a compartment.

[0016] As a further technical solution of the present invention, when the impeller rotates, at least two groups of blades contact the conveyor belt, and at least two groups of blades contacting the conveyor belt form a sealed cavity one. An exhaust channel is opened on the furnace body, and the input end of the exhaust channel is connected to the sealed cavity one, and the output end of the exhaust channel is connected to the outside of the furnace body.

[0017] As a further technical solution of the present invention, an assembly of matching blades is installed on the top wall of the furnace body, and when the impeller rotates, at least two groups of blades contact the assembly, and at least two groups of blades contacting the conveyor belt form a sealed chamber 2. An air intake channel is opened in the assembly, and the input end of the air intake channel is connected to the sealed chamber 2, and the output end of the air intake channel is connected to the inside of the furnace body.

[0018] As a further technical solution of the present invention, the end surface of the assembly facing the impeller is provided with an arc structure coaxial with the rotating shaft.

[0019] As a further technical solution of the present invention, an interlayer is arranged in the plate body, and the interlayer is filled with heat-insulating material.

[0020] The beneficial effects of the present invention are as follows:

[0021] (1) In the present application, an impeller is provided to block the inlet of the furnace body, so that the furnace body cannot communicate with the outside through the inlet, thereby slowing down the rate of gas escape, ensuring the concentration of the protective gas in the furnace body, and reducing the probability of adverse reactions during the sintering process of the product; at the same time, there is a gap between two adjacent blades to form a feeding space for accommodating a portion of material, and when the impeller rotates, several feeding spaces will rotate around the rotating shaft to continuously feed the material, thereby realizing continuous feeding and not affecting the sintering speed.

[0022] (2) In the present application, a deformable portion that can be deformed under the influence of gravity is provided to fill the gap between the conveyor belt and the plate body, so that the blades and the conveyor belt are in soft contact and a temporary sealing surface is formed at the gap to ensure the sealing effect of the inlet when the impeller rotates;

[0023] In addition, a compartment for preventing heat transfer is formed inside the deformable portion, thereby slowing down the heat loss in the furnace body.

[0024] (3) In the present application, by providing a sealed chamber 1 and an exhaust channel, the air stirred into the furnace body by the impeller during rotation can be discharged in time, and by providing a sealed chamber 2 and an air intake channel, the protective gas stirred out of the furnace body by the impeller during rotation can be sucked in in time; the combination of the two can effectively maintain the concentration of the protective gas inside the furnace body. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The overall structure schematic diagram of a large wide continuous electronic packaging gas protection sintering furnace is shown;

[0026] Figure 2 Schematic diagram showing the structure of the impeller

[0027] Figure 3 A schematic diagram of the planar structure of a blade is shown;

[0028] Figure 4 shows a schematic structural diagram of the deformable portion in a normal state;

[0029] Figure 5 A schematic diagram of the structure of the deformable part in the extended state is shown.

[0030] 100, furnace body; 110, inlet; 200, conveyor belt; 300, impeller; 310, rotating shaft; 320, blades; 321, plate body; 322, deformable part; 3221, sealing film; 3222, counterweight shaft; 3223, support member; 3224, compartment; 330, feeding space; 340, sealed chamber 1; 350, exhaust channel; 360, assembly; 370, sealed chamber 2; 380, suction channel; 390, output motor. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0032] Figure 1 The overall structure schematic diagram of a large wide continuous electronic packaging gas protection sintering furnace is shown; Figure 1In the present invention, the large wide continuous electronic packaging gas protection sintering furnace comprises: a furnace body 100, which has at least one inlet 110; it is explained here that the number of inlets 110 can be one or more; a conveyor belt 200, which is laid into the furnace body 100 through the inlet 110; the conveyor belt 200 is a conventional conveying device, and the feeding end is not restricted, and any feeding device can be externally connected, and the feeding direction is from the outside of the furnace body 100 to the inside of the furnace body 100; an impeller 300, which is arranged at the inlet 110 of the furnace body 100 and blocked; the impeller 300 is installed at the inlet 110 of the furnace body 100 and can be blocked to prevent the furnace body 100 from communicating with the outside. At this time, the gas inside the furnace body 100 can be effectively prevented from escaping, and the external gas can enter the furnace body 100, so as to ensure that the material does not have adverse reactions during the sintering process.

[0033] It should be noted that the number of inlets 110 described above is not limited, and accordingly, the number of impellers 300 is also not limited, and they are arranged corresponding to the inlets 110; for example: when there are two inlets 110 on the furnace body 100, both of the two inlets 110 are provided with impellers 300; and in the prior art, the furnace body 100 should also have an outlet corresponding to the inlet 110, and the impeller 300 can also be installed on the outlet, and should not be limited to the inlet 110.

[0034] Figure 2 shows a schematic structural diagram of an impeller 300; Figure 2 In the embodiment, the impeller 300 includes a rotatable shaft 310 and a plurality of blades 320 uniformly arranged along the circumference of the shaft 310. There is a gap between two adjacent blades 320 to form a feeding space 330 for accommodating a portion of material. The plurality of feeding spaces 330 rotate around the shaft 310 along with the feeding of the conveyor belt 200 and continuously feed the material. When the shaft 310 rotates, it can drive the plurality of blades 320 to rotate, thereby causing the plurality of feeding spaces 330 to rotate around the shaft 310. Since each feeding space 330 corresponds to a portion of material, continuous feeding can be achieved, and the specific space of the feeding space 330 is not limited. The system can be specifically set as needed, wherein the rotating shaft 310 described herein rotates synchronously with the feeding of the conveyor belt 200 means that there is a correlation between the feeding frequency of the conveyor belt 200 and the rotation speed of the rotating shaft 310, and the two need to cooperate with each other and can be adjusted independently as needed. The specific parameters are not limited in detail in this application; that is, the impeller 300 not only blocks the inlet 110, so that the furnace body 100 cannot be connected to the outside through the inlet 110, but also slows down the speed of gas escape, ensures the concentration of protective gas in the furnace body 100, reduces the probability of adverse reactions during the sintering process of the product, and can feed continuously so that the sintering speed is not affected.

[0035] It should be noted that the rotation of the rotating shaft 310 may be independent rotation, for example Figure 1 In the embodiment, an output motor 390 is installed on the furnace body 100, and the output end of the output motor 390 is connected to the rotating shaft 310; the driving force of the output motor 390 is used to drive the rotating shaft 310 to rotate; but in some other embodiments, the rotating shaft 310 can also rotate with the conveyor belt 200, that is, the transmission part of the conveyor belt 200 is connected to the rotating shaft 310, so that there is a continuous correlation effect between the two.

[0036] However, due to the planar structure of the conveyor belt 200 , if a better seal is to be formed between the blade 320 and the conveyor belt 200 , soft contact between the blade 320 and the conveyor belt 200 is required. On this basis, the present application continues to improve the blade 320 .

[0037] Figure 3 A schematic diagram of the planar structure of the blade 320 is shown; Figure 4 shows a schematic structural diagram of the deformable portion 322 in a normal state; Figure 5 It shows a schematic structural diagram of the deformable portion 322 in an extended state;

[0038] Figure 3 In the embodiment, the blade 320 includes a plate body 321, and a gap is formed between the plate body 321 and the conveyor belt 200 when the plate body 321 rotates, and a deformable portion 322. The deformable portion 322 includes a sealing film 3221 connected to the free end of the plate body 321, and the other end of the sealing film 3221 is connected to a counterweight shaft 3222. The counterweight shaft 3222 is affected by gravity to stretch the sealing film 3221 to form a temporary sealing surface between the plate body 321 and the conveyor belt 200 to fill the gap; one end of the plate body 321 away from the deformable portion 322 is connected to the rotating shaft 310, and the sealing film 3221 is an elastic rubber film body, which can be made of silicone rubber, natural rubber, nitrile rubber, etc. Without making any specific restrictions, when the impeller 300 rotates, the counterweight shaft 3222 falls down by its own gravity and stretches the sealing film 3221 until the counterweight shaft 3222 overlaps the surface of the conveyor belt 200. The sealing film 3221 can form a temporary sealing surface between the plate body 321 and the conveyor belt 200, thereby filling the gap between the conveyor belt 200 and the plate body 321, that is, through soft contact sealing; an interlayer is provided in the plate body 321, and the interlayer is filled with thermal insulation material; the thermal insulation material here can be rock wool, polyurethane foam, polystyrene foam, etc., without making any specific restrictions, and the use of the thermal insulation material can effectively prevent the heat loss in the furnace body 100.

[0039] Continue to see Figure 3-Figure 5; The sealing film 3221 is a bag-type structure, and the counterweight shaft 3222 is installed in the sealing film 3221. When the counterweight shaft 3222 is overlapped to the conveyor belt 200, the portion of the sealing film 3221 spaced between the counterweight shaft 3222 and the conveyor belt 200 is compressed and deformed; in this way, the sealing film 3221 is changed from a film surface to a pocket, and its open end is wrapped around the free end of the plate body 321. When the counterweight shaft 3222 is overlapped on the conveyor belt 200, since the counterweight shaft 3222 is indirectly in contact with the conveyor belt 200 through the sealing film 3221, the counterweight shaft 3222 will compress the portion of the sealing film 3221 spaced between the counterweight shaft 3222 and the conveyor belt 200 to deform, thereby further improving the sealing effect of the sealing surface.

[0040] Continue to see Figure 4 and Figure 5 The sealing film 3221 is filled with a support member 3223, and the support member 3223 is arranged in the sealing film 3221 in an X-structure to form a compartment 3224, and the support member 3223 is polyurethane foam; the supportability of the support member 3223 can be used to shape the compartment 3224 to form a heat-insulating space, and the support member 3223 is deformable and can be stretched and deformed to adapt to the stretching of the sealing film 3221. At the same time, the support member 3223 also has memory and can recover when not under force, which is conducive to multiple uses.

[0041] It should be noted that the interior of the support member 3223 is a hollow structure, which is conducive to the deformation of the support member 3223.

[0042] Continue to see Figure 3 When the impeller 300 rotates, at least two groups of blades 320 contact the conveyor belt 200, and at least two groups of blades 320 contacting the conveyor belt 200 form a sealed cavity 340. An exhaust channel 350 is provided on the furnace body 100, and the input end of the exhaust channel 350 is connected to the sealed cavity 340, and the output end of the exhaust channel 350 is connected to the outside of the furnace body 100. This is because some external air will enter when the material enters, and an air pump is installed in the exhaust channel 350. When the air pump is started, the external air can be sucked out before entering the furnace body 100, thereby avoiding the dilution of the protective gas concentration in the furnace body 100.

[0043] Continue to see Figure 3An assembly 360 for matching blades 320 is installed on the top wall of the furnace body 100. When the impeller 300 rotates, at least two groups of blades 320 contact the assembly 360. At least two groups of blades 320 contacting the conveyor belt 200 form a sealed chamber 2 370. An air suction channel 380 is opened in the assembly 360. The input end of the air suction channel 380 is connected to the sealed chamber 2 370, and the output end of the air suction channel 380 is connected to the inside of the furnace body 100. Since the impeller 300 will stir out part of the gas inside the furnace body 100 when it rotates, the air suction channel 380 is used to The arrangement can suck the stirred gas back into the furnace body 100; in conjunction with the above-mentioned sealing chamber 340 and exhaust channel 350, the two can effectively maintain the concentration of the protective gas inside the furnace body 100; the end surface of the assembly 360 facing the impeller 300 is arranged to be an arc structure coaxial with the rotating shaft 310; in this way, when the blade 320 is stirring, the deformable part 322 can seal the gap between the plate body 321 and the assembly 360 like the gap between the sealing plate body 321 and the conveyor belt 200, so as to ensure the sealing effect.

[0044] The above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them.

Claims

1. Large and wide continuous electronic packaging gas protection sintering furnace, including: A furnace body (100), wherein the furnace body (100) has at least one inlet (110); A conveyor belt (200) is laid through the inlet (110) into the furnace body (100) to transport materials; It is characterized by further comprising: An impeller (300) is arranged at the inlet (110) of the furnace body (100) and blocks the inlet (110). The impeller (300) comprises a rotatable shaft (310) and a plurality of blades (320) uniformly arranged along the circumference of the shaft (310). A gap is provided between two adjacent blades (320) to form a feeding space (330) for accommodating a portion of material. The plurality of feeding spaces (330) rotate around the shaft (310) as the conveyor belt (200) feeds the material and continuously feeds the material.

2. The large wide continuous electronic packaging gas protection sintering furnace according to claim 1 is characterized in that: The blade (320) comprises: a plate body (321), wherein a gap is formed between the plate body (321) and the conveyor belt (200) when the plate body (321) rotates; The deformable portion (322) includes a sealing film (3221) connected to the free end of the plate body (321), and the other end of the sealing film (3221) is connected to a counterweight shaft (3222). The counterweight shaft (3222) stretches the sealing film (3221) under the influence of gravity to form a temporary sealing surface between the plate body (321) and the conveyor belt (200) to fill the gap.

3. The large wide continuous electronic packaging gas protection sintering furnace according to claim 2 is characterized in that: The sealing film (3221) is a bag-type structure, and the counterweight shaft (3222) is installed in the sealing film (3221). When the counterweight shaft (3222) is overlapped with the conveyor belt (200), the portion of the sealing film (3221) spaced between the counterweight shaft (3222) and the conveyor belt (200) is compressed to deform.

4. The large wide continuous electronic packaging gas protection sintering furnace according to claim 3 is characterized in that: The sealing film (3221) is filled with a support member (3223), the support member (3223) is polyurethane foam, and the interior of the support member (3223) is a hollow structure.

5. The large wide continuous electronic packaging gas protection sintering furnace according to claim 4 is characterized in that: The support member (3223) is arranged in an X-structure support inside the sealing film (3221) to form a compartment (3224).

6. The large wide continuous electronic packaging gas protection sintering furnace according to claim 5, characterized in that: When the impeller (300) rotates, at least two groups of blades (320) contact the conveyor belt (200), and at least two groups of blades (320) contacting the conveyor belt (200) form a sealed cavity (340). An exhaust channel (350) is provided on the furnace body (100), and an input end of the exhaust channel (350) is connected to the sealed cavity (340), and an output end of the exhaust channel (350) is connected to the outside of the furnace body (100).

7. The large wide continuous electronic packaging gas protection sintering furnace according to claim 6, characterized in that: An assembly (360) for matching blades (320) is installed on the top wall of the furnace body (100); when the impeller (300) rotates, at least two groups of blades (320) contact the assembly (360); at least two groups of blades (320) contacting the conveyor belt (200) form a sealed chamber 2 (370); an air intake channel (380) is opened in the assembly (360); an input end of the air intake channel (380) is connected to the sealed chamber 2 (370), and an output end of the air intake channel (380) is connected to the inside of the furnace body (100).

8. The large wide continuous electronic packaging gas protection sintering furnace according to claim 7, characterized in that: The end surface of the assembly (360) facing the impeller (300) is provided with an arc-shaped structure coaxial with the rotating shaft (310).

9. The large wide continuous electronic packaging gas protection sintering furnace according to claim 7, characterized in that: The plate body (321) is provided with an interlayer, and the interlayer is filled with heat-insulating material.

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